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本文介绍双高阻离子选择性微电极阻抗转换器,该转换器采用高输入阻抗,高共模抑制放大器,在高阻输入线的屏蔽层加低阻的自举电势,使绝缘层同无电压降,消除了可能产生的漏电,减少噪声及输入电缆的屏蔽电容,从而降低了放大器总的输入电容,提高响应速度和抗共模干扰能力.这种双高阻转换器即可用低阻的参比电极构成电池体系.也可用高阻的微参比电极或用离子选择性电极作参比电极.为离子选择性微电极的研究和应用创造了条件.
This article describes the dual high resistance ion selective microelectrode impedance converter, the converter uses high input impedance, high common mode rejection amplifier, high impedance input line in the shield and low resistance bootstrap potential, the insulation with no voltage Reduce the possible leakage, reduce noise and shielded capacitance of the input cable, thereby reducing the total input capacitance of the amplifier to improve response speed and anti-common-mode interference capability. This dual high-impedance converter can be used with low-impedance reference Compared with the electrode to form a battery system, a high resistance micro reference electrode or an ion selective electrode can also be used as a reference electrode, which provides the conditions for the research and application of the ion selective microelectrode.